<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
    <style>
        .button {
            display: inline-block;
            border-radius: 4px;
            background-color: #f4511e;
            border: none;
            color: #FFFFFF;
            text-align: center;
            font-size: 28px;
            padding: 20px;
            width: 200px;
            transition: all 0.5s;
            cursor: pointer;
            margin: 5px;
        }

        .button span {
            cursor: pointer;
            display: inline-block;
            position: relative;
            transition: 0.5s;
        }

        .button span:after {
            content: '»';
            position: absolute;
            opacity: 0;
            top: 0;
            right: -20px;
            transition: 0.5s;
        }

        .button:hover span {
            padding-right: 25px;
        }

        .button:hover span:after {
            opacity: 1;
            right: 0;
        }


        .button_b {
            position: relative;
            background-color: #4CAF50;
            border: none;
            font-size: 28px;
            color: #FFFFFF;
            padding: 20px;
            width: 200px;
            text-align: center;
            -webkit-transition-duration: 0.4s; /* Safari */
            transition-duration: 0.4s;
            text-decoration: none;
            overflow: hidden;
            cursor: pointer;
        }

        .button_b:after {
            content: "";
            background: #90EE90;
            display: block;
            position: absolute;
            padding-top: 300%;
            padding-left: 350%;
            margin-left: -20px!important;
            margin-top: -120%;
            opacity: 0;
            transition: all 0.8s
        }
        .button_b:active:after {
            padding: 0;
            margin: 0;
            opacity: 1;
            transition: 0s
        }

        .button_p {
            display: inline-block;
            padding: 15px 25px;
            font-size: 24px;
            cursor: pointer;
            text-align: center;
            text-decoration: none;
            outline: none;
            color: #fff;
            background-color: #4CAF50;
            border: none;
            border-radius: 15px;
            box-shadow: 0 9px #999;
        }

        .button_p:hover {background-color: #3e8e41}

        .button_p:active {
            background-color: #3e8e41;
            box-shadow: 0 5px #666;
            transform: translateY(4px);
        }

    </style>
</head>
<body>

<h2>按钮动画</h2>

<button class="btn btn-xs btn-">xs</button>


<button class="button" style="vertical-align:middle"><span>Hover </span></button>


<h2>按钮动画 - 波纹效果</h2>

<button class="button_b">Click Me</button>

<h2>按钮动画 - "按压效果"</h2>

<button class="button_p">Click Me</button>
</body>
</html>